C11112331312111112111133133313331333133313223223313121111133311232313111   >>    C1111233131211111211113313331333133313331322322331312111113331123231311   <<    C11112331312111112111133133313331333133313223223313121111133311232313113   >>      C11112331312111112111133133313331333133313223223313121111133311232313112   >>